Best way to get from Venice to Treviso Airport

Don't know if Trevis o Centrale train station is near the airport. This spring it was 5Euros ATVO blue bus from the Mestre parking area(across from the main huge bldg) to Treviso Airport. Take the valparetto to the Mestre stop (next stop after the Venice Train Station.) Do a dry run to Mestre ahead of time and purchase your ticket at the tourist office in the main huge building--it is well marked on the outside of the bldg.grd floor closes at 5 PM? Mestre also services other buses and the bus stop for the Treviso is not well marked. Other buses stop at the same stop. We failed to read the fine print on the bottom of both our schedule and the schedule posted at the bus stop. It tells you when the bus comes that goes to the airport. We planned to catch a 9:00 AM bus and discovered that it didn't come for another two hours-no place to sit.
PS At Venice train station outside when purchasing a valparetto pass(check for correct change.) Passes includes Murano regardless # hrs of pass

If you go on the ryanair site and look under destinations there are the transport links.As I remember there are frequent airport bus connections to Venice But the local train to treviso station-venice , plus local shuttle bus is about half theprice of airport bus.The fares are listed